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Grain sorghum injured by sugarcane aphid. Grain sorghum infested with an average of 50 (A), 250 (B), and 500 (C) aphids per leaf. Panel B illustrates 250 sugarcane aphids per leaf with visible signs of plant damage and honeydew buildup caused by its feeding activity. Plant injury, yield reduction, and head deformation are visible when sugarcane aphid populations build at or above 500 per leaf (Panel C).
